Thermoplastic composite material vehicle door anti-collision beam
Through the multi-layer hat-shaped beam structure and energy-absorbing mechanism made of thermoplastic composite materials, the problem of large weight and poor collision resistance of door anti-collision beams is solved, and the lightweight design and efficient energy-absorbing effect are achieved, reducing production costs and cycles.
Patent Information
- Application Number
- CN202422611760.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-29
AI Technical Summary
The existing door anti-collision beam structure has heavier weight, poor collision resistance, and is difficult to form and costly. The existing technology has not effectively solved it.
The multi-layer hat-shaped beam structure anti-collision beam made of thermoplastic composite materials combines frame-shaped reinforcement ribs and X-shaped support structures, and an energy-absorbing mechanism is installed inside, including wavy protrusions and honeycomb structural plates, and rapid molding is achieved through molding and injection molding process.
The lightweight design of the door structure is realized, the compression, bending and impact resistance are improved, the ability to absorb external loads is enhanced, and the production cost and cycle are reduced.
Smart Images
Figure CN223252744U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of anti-collision beams, in particular to a thermoplastic composite material vehicle door anti-collision beam. Background Art
[0002] With the development of the automotive industry, society is placing increasing emphasis on lightweighting vehicles. Door structures, including interior door panels, exterior door panels, window frames, reinforcement beams, and door baseplates, are crucial for lightweighting. Within the door structure, the transverse door anti-collision beam is an effective measure to strengthen the vehicle's body structure against collisions.
[0003] Disadvantages of existing door anti-collision beams:
[0004] Door anti-collision beams are constructed using either steel tubes or stamped cap-shaped steel sheets. While steel tubes offer simpler molding, lighter weight, and improved manufacturing processes, they are difficult to install and have certain limitations. Stamped structural steel offers some improvements in installation, but they are more difficult to form and have higher mold costs. Currently, most anti-collision beams in automobile bodies are made of high-strength structural steel, which can only absorb external loads through deformation, resulting in relatively poor crashworthiness.
[0005] Currently, no effective solutions have been proposed for the problems in related technologies. Utility Model Content
[0006] In response to the problems in the related art, the present invention proposes a thermoplastic composite vehicle door anti-collision beam to overcome the above technical problems existing in the existing related art.
[0007] To this end, the specific technical solutions adopted in this utility model are as follows:
[0008] A thermoplastic composite vehicle door anti-collision beam comprises an anti-collision beam body, one side of which is provided with a plurality of reinforcing ribs; an energy absorbing mechanism is provided on one side of the anti-collision beam body and inside the reinforcing ribs; and a fixed connection portion is provided at the edge of the anti-collision beam body.
[0009] Furthermore, in order to improve the compression, bending and impact resistance of the overall structure of the door anti-collision beam, the cross-section of the anti-collision beam body is a cap-type beam structure, and the anti-collision beam body is set as a multi-layer structure; the reinforcement ribs are a frame-type structure, and an X-shaped support structure is set inside the frame structure.
[0010] Furthermore, in order to improve the door anti-collision beam's ability to absorb external loads and its anti-collision ability, the energy-absorbing mechanism includes a fixed body arranged on one side of the anti-collision beam body and located inside the reinforcing rib, and a wavy protrusion is provided on one side of the fixed body; an installation groove is provided inside the fixed body, and a honeycomb structure plate is provided in the installation groove.
[0011] Furthermore, in order to ensure that the vehicle door anti-collision beam can be firmly connected to the vehicle door, the fixed connection portion includes a side ear arranged at the edge of the anti-collision beam body, and a mounting hole is provided in the side ear.
[0012] The beneficial effects of the utility model are:
[0013] (1) The present invention adopts a continuously reinforced thermoplastic composite material, which can realize a lightweight design of the door structure and improve the ability to absorb external loads, thereby improving the anti-collision ability.
[0014] (2) The structural design of the anti-collision beam body and reinforcement ribs effectively improves the compression, bending and impact resistance of the overall structure of the door anti-collision beam. At the same time, the use of thermoplastic composite materials combined with a frame structure and a multi-layer cap beam structure effectively reduces the overall weight.
[0015] (3) By setting up an energy absorption mechanism, during the collision process, the initial impact force is first absorbed by the layer-by-layer compression of the wave line, and then the honeycomb structure further absorbs the remaining energy, ensuring a better energy absorption effect and improving the door anti-collision beam's ability to absorb external loads and resist collisions. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0017] Figure 1 This is a schematic structural diagram of one side of a thermoplastic composite vehicle door anti-collision beam according to an embodiment of the present utility model;
[0018] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle;
[0019] Figure 3 This is a schematic structural diagram of an energy absorption mechanism in a thermoplastic composite vehicle door anti-collision beam according to an embodiment of the present utility model;
[0020] Figure 4 It is a structural schematic diagram of the other side of a thermoplastic composite vehicle door anti-collision beam according to an embodiment of the present utility model.
[0021] In the picture:
[0022] 1. Anti-collision beam body; 2. Reinforcement ribs; 3. Energy absorption mechanism; 301. Fixed body; 302. Wave-shaped protrusion; 303. Mounting groove; 304. Honeycomb structure plate; 4. Fixed connection part; 401. Side ear; 402. Mounting hole. DETAILED DESCRIPTION
[0023] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. By referring to these contents, ordinary technicians in this field should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.
[0024] According to an embodiment of the present invention, a thermoplastic composite vehicle door impact beam is provided. Specifically, this is a thermoplastic composite vehicle door impact beam structure reinforced with fully continuous fibers. The door substrate is constructed of thermoplastic composite, and rapid prototyping is achieved by stripping the molded plate and injection molded components.
[0025] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figure 1-4 As shown, the thermoplastic composite door anti-collision beam according to an embodiment of the present invention includes an anti-collision beam main body 1, and a plurality of reinforcing ribs 2 are provided on one side of the anti-collision beam main body 1; an energy absorbing mechanism 3 is provided on one side of the anti-collision beam main body 1 and inside the reinforcing ribs 2, and a fixed connection part 4 is provided at the edge of the anti-collision beam main body 1.
[0026] With the aid of the above solution, the present invention adopts a continuously reinforced thermoplastic composite material, which can achieve a lightweight design of the door structure and improve the ability to absorb external loads, thereby improving the anti-collision ability.
[0027] In one embodiment, for the above-mentioned anti-collision beam body 1, the cross-section of the anti-collision beam body 1 is a hat-shaped beam structure (i.e., a beam structure with a hat-shaped cross-section), and the anti-collision beam body 1 is configured as a multi-layer structure; the reinforcement rib 2 is a frame-type structure, and an X-shaped support structure is provided inside the frame-type structure, thereby effectively improving the compression and bending resistance of the overall structure of the door anti-collision beam. The multi-layer hat-type structure provides multiple protections, and the X-shaped support can enhance the torsional rigidity, making the anti-collision beam more stable and strong when subjected to external force impact. The X-shaped support structure can evenly disperse the external load during impact, reduce stress concentration in a single area, and achieve energy absorption effect during compression deformation, thereby improving the impact resistance of the entire door anti-collision beam. The use of thermoplastic composite materials combined with a frame-type structure and a multi-layer hat-type beam structure achieves effective weight reduction while maintaining high strength, thereby reducing the overall weight of the vehicle.
[0028] Composite materials have good specific strength and specific stiffness, low density, and can achieve vehicle weight reduction to a certain extent. The thermoplastic composite door anti-collision beam of the present invention determines the thickness of the continuous fiber composite material structure through equal stiffness design, so that it has the ability to resist deformation within the same range as high-strength steel, can effectively withstand external loads during side collisions, and further improve the strength of the structure. The door anti-collision beam is designed with a rib cap to obtain a continuous fiber reinforced composite door anti-collision beam with reinforcing ribs. Considering the molding process and cost of the door, the present invention considers using a thermoplastic composite material compression injection molding method, wherein the main body 1 of the anti-collision beam is molded with a continuous reinforced composite material sheet, and the reinforcing rib 2 is injection-molded and filled. For example, the main body 1 of the anti-collision beam is made of a continuous reinforced thermoplastic carbon fiber composite sheet, the sheet is placed in a high-temperature infrared oven to soften, and then clamped into a hot pressing mold. At the same time, a certain amount of continuous fiber resin mixture is injected into the mold, and a cavity for the injection molded part is left in the mold. After cooling and solidifying for a certain period of time, it is integrally molded.
[0029] The use of continuously reinforced thermoplastic composites enables lightweight door structure design. Using a compression injection molding process, the door anti-collision beam structure is separated into molded and injection-molded sections. Injection molding and filling are performed during the hot pressing process, and simultaneous cooling and curing occur during mold opening, enabling rapid prototyping and reducing production cycle time and costs. The integration of compression molding and injection molding significantly improves the anti-collision beam structure.
[0030] In one embodiment, for the above-mentioned energy absorbing mechanism 3, the energy absorbing mechanism 3 includes a fixed body 301 arranged on one side of the anti-collision beam main body 1 and located inside the reinforcing rib 2, and a wavy protrusion 302 is provided on one side of the fixed body 301; an installation groove 303 is provided inside the fixed body 301, and a honeycomb structure plate 304 is provided in the installation groove 303, so that during the collision process, the initial impact force is first absorbed by the layer-by-layer compression of the wavy line, and then the remaining energy is further absorbed by the honeycomb structure to ensure better energy absorption effect.
[0031] The energy absorption mechanism 3 operates as follows: When an external impact occurs, the wavy protrusions 302, serving as the first layer of the energy absorption mechanism 3, are first subjected to the impact force. The wavy structure gradually compresses, absorbing some of the impact energy through elastic and plastic deformation. As the wavy protrusions 302 begin to compress, the impact force is gradually transferred to the honeycomb structure plate 304. Honeycomb structure plate 304 contains numerous hexagonal or porous structures. When subjected to compression, these pores gradually collapse, further absorbing energy.
[0032] In one embodiment, for the above-mentioned fixed connection part 4, the fixed connection part 4 includes a side ear 401 arranged at the edge of the anti-collision beam body 1, and a mounting hole 402 is provided in the side ear 401, so that the door anti-collision beam can be firmly connected to the door.
[0033] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process is described in detail below.
[0034] In practical applications, a fiber-containing resin is injected during hot pressing to fill the main body 1 and reinforcement ribs 2 of the door anti-collision beam structure (thermoplastic composite sheet materials cannot or are difficult to directly mold). This allows for rapid prototyping of the door anti-collision beam. The energy absorption mechanism 3 is attached to the side of the main body 1 by inlaying, bonding, or other methods.
[0035] The anti-collision beam body 1 can first bear and disperse part of the impact force during a collision, and the reinforcement ribs 2 provide additional torsional rigidity. The wavy protrusion 302, as the first layer of the energy-absorbing mechanism 3, is first subjected to the impact force. Its wavy structure will gradually compress, absorbing part of the impact energy through the elastic and plastic deformation of the material. When the wavy protrusion 302 begins to be compressed, the impact force is gradually transmitted to the honeycomb structure plate 304. There are a large number of hexagonal or porous structures inside the honeycomb structure plate 304. When subjected to compression force, these porous structures will gradually collapse, thereby further absorbing energy. The multi-stage energy absorption mode can decompose the impact force to a greater extent.
[0036] In summary, the present invention adopts a continuously reinforced thermoplastic composite material, which can realize a lightweight design of the door structure and improve the ability to absorb external loads, thereby improving the anti-collision ability. Through the structural design of the anti-collision beam body 1 and the reinforcement rib 2, the compression, bending and impact resistance of the overall structure of the door anti-collision beam are effectively improved. At the same time, the use of thermoplastic composite materials combined with the frame structure and the multi-layer cap beam structure effectively reduces the overall weight. By setting up an energy-absorbing mechanism 3, during the collision process, the initial impact force is first absorbed by the layer-by-layer compression of the wave line, and then the honeycomb structure further absorbs the remaining energy, ensuring a better energy absorption effect and improving the ability of the door anti-collision beam to absorb external loads and the anti-collision ability.
[0037] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.
[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A thermoplastic composite vehicle door anti-collision beam, comprising an anti-collision beam body (1), characterized in that: A plurality of reinforcing ribs (2) are provided on one side of the anti-collision beam body (1); An energy absorbing mechanism (3) is provided on one side of the anti-collision beam body (1) and inside the reinforcing rib (2), and a fixed connection portion (4) is provided at the edge of the anti-collision beam body (1).
2. The thermoplastic composite door anti-collision beam according to claim 1, characterized in that: The cross section of the anti-collision beam body (1) is a hat-shaped beam structure, and the anti-collision beam body (1) is configured as a multi-layer structure.
3. The thermoplastic composite door anti-collision beam according to claim 1, characterized in that: The reinforcing rib (2) is a frame-shaped structure, and an X-shaped supporting structure is provided inside the frame-shaped structure.
4. A thermoplastic composite vehicle door anti-collision beam according to claim 2 or 3, characterized in that: The energy absorbing mechanism (3) comprises a fixing body (301) arranged on one side of the anti-collision beam body (1) and located inside the reinforcing rib (2); a wave-shaped protrusion (302) is provided on one side of the fixing body (301).
5. The thermoplastic composite door anti-collision beam according to claim 4, characterized in that: The interior of the fixed body (301) is provided with a mounting groove (303), and a honeycomb structure plate (304) is provided in the mounting groove (303).
6. The thermoplastic composite door anti-collision beam according to claim 1, characterized in that: The fixed connection portion (4) comprises a side ear (401) arranged at the edge of the anti-collision beam body (1), and a mounting hole (402) is provided in the side ear (401).